Laser-irradiated thin films having variable thickness
First Claim
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1. A film on a substrate, comprising:
- a first crystalline region having a first film thickness and a crystalline grain structure having highly elongated crystal grains that are defined by a first set of grain boundaries that are substantially parallel to long axes of the grains; and
a second crystalline region having a second film thickness and one of a homogeneous small grained polycrystalline grain structure and a crystalline grain structure having elongated crystal grains that are defined by a first set of grain boundaries that are substantially parallel to long axes of the grain, wherein the first film thickness is greater than the second film thickness, wherein the first and second crystalline regions have a size sufficient to accommodate an active channel of an electronic device, and wherein the first region possesses fewer grain boundaries or other defects per unit area than the second region.
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Abstract
A crystalline film includes a first crystalline region having a first film thickness and a first crystalline grain structure; and a second crystalline region having a second film thickness and a second crystalline grain structure. The first film thickness is greater than the second film thickness and the first and second film thicknesses are selected to provide a crystalline region having the degree and orientation of crystallization that is desired for a device component.
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Citations
18 Claims
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1. A film on a substrate, comprising:
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a first crystalline region having a first film thickness and a crystalline grain structure having highly elongated crystal grains that are defined by a first set of grain boundaries that are substantially parallel to long axes of the grains; and a second crystalline region having a second film thickness and one of a homogeneous small grained polycrystalline grain structure and a crystalline grain structure having elongated crystal grains that are defined by a first set of grain boundaries that are substantially parallel to long axes of the grain, wherein the first film thickness is greater than the second film thickness, wherein the first and second crystalline regions have a size sufficient to accommodate an active channel of an electronic device, and wherein the first region possesses fewer grain boundaries or other defects per unit area than the second region. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18)
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Specification